www.renttherunway.com / they didn't return my money back

I bought dress for the event from the website www.renttherunway.com. I placed the order and paid for the fast delivery. I spent about $600 for the whole order, but the company decided to scam me. They took money and haven’t delivered the order on time. It was terrible deal and now I can’t reach them and return my money back. I won’t deal with these guys again.